/*

Blink Test
(Using Only Pointers)
-----------------------

Push buttons are used to control
the on-board LEDs.

*/

// Direction Masks
#define outputDir	0x00000000	// All output bits
#define inputDir	0x0000001F	// 5-input bits

int main()
{
  // Pointer defintions for Button GPIO
  //	** NOTE - integer definition causes
  //	          offsets to be automatically
  //				 be multiplied by 4!!
  volatile int *base_buttonGPIO	= (int*)(0x40040000);
  volatile int *data_buttonGPIO	= (int*)(base_buttonGPIO + 0x0);
  volatile int *tri_buttonGPIO	= (int*)(base_buttonGPIO + 0x1);

  // Pointer defintions for LED GPIO
  //	** NOTE - integer definition causes
  //	          offsets to be automatically
  //				 be multiplied by 4!!
  volatile int *base_ledGPIO	= (int*)(0x40000000);
  volatile int *data_ledGPIO	= (int*)(base_ledGPIO + 0x0);
  volatile int *tri_ledGPIO	= (int*)(base_ledGPIO + 0x1);

  // Variable used to store the state of the buttons
  int data = 0;
  
  // Display memory-map
  print("\r\nBegin...\r\n\r\n\tRegister Offsets:\r\n");
  xil_printf("\tdataButton  = 0x%08x\r\n",(int)data_buttonGPIO);
  xil_printf("\ttriButton   = 0x%08x\r\n",(int)tri_buttonGPIO);
  xil_printf("\tdataLED     = 0x%08x\r\n",(int)data_ledGPIO);
  xil_printf("\ttriLED      = 0x%08x\r\n",(int)tri_ledGPIO);
	
  // Init. the LED peripheral to outputs
  print("Init. LED GPIO Data Direction...\r\n");
  *tri_ledGPIO = outputDir;

  // Init. the Button peripheral to inputs
  print("Init. Button GPIO Data Direction...\r\n");
  *tri_buttonGPIO = inputDir;
  
  // Infinitely Loop...
  while(1)
    {
	
	// Read the current state of the push buttons
	data = *data_buttonGPIO;		
	xil_printf("buttonState = %d\r\n",data);

	// Set the state of the LEDs
	*data_ledGPIO = data;
    }
	 
  return 0;
}